As models in 'starter sets' go, the Foetid Bloat-Drone has to be right up there with the best.
I absolutely love this guy! He's been pretty decent on the battlefield for me (one of my few units that have!) and was a blast to paint. I particularly enjoyed doing the eye lense and the line highlights on the flesh.
Also, not sure if you can make it out well on the picture here but I enjoyed trying out the verdigris effect on the bronze.